Turbo Granny

Turbo Granny (Turbo Baachan) is a type of modern-day yōkai or anomaly associated with urban legends. The legend typically describes a scenario in which a person driving through a tunnel suddenly hears a knock on the window and sees an old woman running alongside the vehicle, staring at them. The location of these sightings is frequently cited as Mount Rokkō in Hyōgo Prefecture. In the Encyclopedia of Modern Japanese Supernatural Phenomena, Itsuki Asazato references an entry from Don't Turn Around for Tanaka in a Dream describing an anomaly on Mount Rokkō as an old woman who "appears on the highway and runs on all fours alongside speeding cars," with "a piece of paper reading 'Turbo' attached to her back."